Am I crazy? R looks like Javascript?

So, I decided to learn how to code using R. That’s something I wrote:

## defining a function
makeCacheMatrix <- function(x = matrix()) {
  ## internal state
  inv <- NULL

  ## defining some closures
  set <- function(y) {
    x <<- y
    inv <<- NULL
  }
  get <- function() x
  setinverse <- function(inverse = matrix()) inv <<- inverse
  getinverse <- function() inv
  
  ## returning functions as an object 
  list(
     set = set, 
     get = get, 
     setinverse = setinverse, 
     getinverse = getinverse
  )
}

Am I crazy? This code remembers me of JavaScript. Do you agree with that?